Equilibrium of concurrent forces -- 3 Pulleys and 2 Weights

[Butterfly41398]

Homework Statement

Find the the value of the force shown

Relevant Equations

F=ma

Help, this one is completely different, the weird pulley is making it hard for me and I don't even know what to do with it and where to start. The answer is 185N but I want to know how.

 

[Delta2]

Unfortunately the image seems to be cropped and it doesn't contain one vital piece of information: Which is the force $F_w$ which we try to calculate. My guess is that it is the force of the leftmost weight that hangs from the "weird" pulley?

Anyway I think you should start by calculating the tension of the rope that fixes the weight of 70N. This tension is a central "piece" in this problem.

Then you should analyze the forces that are being applied in the "weird pulley" (first pulley in the middle from left) into x and y components. Focus on the y components cause that's where the equation (apply Newton's 2nd law for the y-components, knowing that there is no movement in the y-direction) for finding $F_w$ lies.